Cement-ring for sheet-metal cans



(No Model.)

H. GALLAHA N. V Cement Ring for Sheet Metal Cans.

Patented Oct, 19, I880.

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UNITED STATES PATENT OFFICE.

HENRY OALLAHAN, OF DAYTON, OHIO.

CEMENT-RING FOR SHEET-METAL CANS.

SPECIFICATION forming part of Letters Patent No. 233,326, dated October 19, 1880. Application filed July 21, 1880. (No model.)

To all whom it may concern Be it known that I, HENRY GALLAHAN, of Dayton, in the county of Montgomery and State of Ohio, have invented certain new and useful Improvements in Cement -Rings; and I do hereby declare the following to be a full, clear, and exact description of the same.

My invention relates to an improvement in cement-rings for sheet-metal preserving-cans 5 and it is an improvement upon Letters Patent No. 118,586, granted to me August 29, 1871.

In the patent referred to the invention consisted in constructing a cement ring from straight strips of tin swaged to form a corrugated ring, which ring, with its ends disconnected, was placed around and near the top of the can, and then soldered at the ends and to the can, so as to form a hoop or ring around the top of the can, thereby making a groove for the reception of cement, as set forth in said patent, to which reference is made.

In the present case the novelty consists in the construction from a rectangular strip of metal of a corrugated ring with its ends overlapped and self-interlocked in such a manner that a practically solid ring is produced without the use of solder or other extraneous fastening devices, all as will be herewith set forth and specifically claimed.

In the accompanying drawings, Figure 1 represents the strip of metal from which I form my ring. Fig. 2 is a diametrical view, in side elevation, of the ring after it has been rolled and stretched in the first operation. Fig. 3 is a corresponding view of the ring after it has been corrugated and interlocked by the die or press. Fig. 4 is a plan view of the ring finished. Fig. 5 is an enlarged sectional view through thejoint of its overlapped ends.

While all tinners can make preserving-cans, yet but few have the machinery for making the cement-rings which fit around the mouth and form a gutter for the sealing-wax or cement which holds the top on, and in consequence of the diffioulty of making these rings, except by special and expensive machinery, they have become articles of trade made by a few and sold to tinners for attachment to their cans. It is a great desideratum that these rings be made solid with united ends, all ready to be applied to the cans by simply soldering their lower edges to the can; and, furthermore, they should fit closely to the can to insure neatness of construction.

Heretofore this object has only been attained by making the rings from annular seamless pieces of metal cut from the sheet with great waste, and swaged in a press to form a solid corrugated ring.

My purpose is to accomplish the same result by forming my ring from straight strips, which can be out without waste, and which are overlapped and self-interlocked at their joined ends to form a solid ring without the use of solder.

To this end I take the strips A, Fig. 1, and pass them through proper forming and stretching rolls, which give them the shape in section shown in Fig.2, and at the same time coil them into ring form. By now placing them on a die of the proper size and shape, in a press, with their ends and the turned-in upper edges overlapped, as seen at a, Fig. 2, they are swaged into the corrugated form shown in Fig. 3, and the overlapped portions a are pressed tightly together, making an even seam, as seen at b, Fig. 3. At the same time small punches in the die form indentations in the under portion of the flaring outer edge of the ring, as seen at c, Fig. 4, forming dowel-locks to prevent the disengagement of the joined overlapped ends and forming a simple though firm lock.

While I have represented the look as made by turning the top edge inward, as at I), still the same result could be attained by turning the edge outward.

This construction forms a practically solid ring, ready to be applied to a can without fitting or measurement and without the necessity of soldering the ends.

Having thus fully described my invention, I claim- A corrugated cement-ring for preservingcans having its ends overlapped and self-interlocked, substantially in the manner and for the purpose specified.

In testimony whereof I have hereunto set my hand.

HENRY OALLAHAN. Witnesses:

PATRICK H. GUNOKEL, OHAs. M. PEoK. 

